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(No Model.) 2 Sheets-Sheet 1. E. P. WARNER.

ELECTRIC SWITCH.

No. 473,435. Patented Apr. 19', 1892.

(No Model.) 2 Sheets-Sheet 2.

E. P. WARNER. ELECTRIC SWITCH.

No. 473,435. Patented Apr. 19, 1892.

Wibiwd ed:

MMV

UNITED STATES- PATENT OFFICE.

ERNEST P. WVARNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE lVESTERNELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 473,435, dated April19, 1892. Application filed February 2, 1889. Serial No. 298,492. (Nomodel.)

To all whom it may concern: we will consider as connected with diiferentBe it known that I, ERNEST I. IVARNER, a terminals of onedynamo-machine,whilebindcitizen of the United States, residing atOhiing-posts e f may be considered as connected cage, in the county of(look and State of Illiwith the different terminals of another dynois,have invented a certain new and useful namo-machine. The shifter g ispivoted be- Improvement in 'lransfer-Switches, (Case No. tween the pairsof springs-that is, between 23,) of which the following is a full,clear, 0011- the springs c (l on one side of block h and cise, and exactdescription, reference being the springs e'f' on the other side of saidblock had to the accompanying drawings, forming a h. The shifter, asshown, consists of a block I part of this specification. of insulatingmaterial provided with metallic 6o Myinvention relates to electricswitches of pieces gand g on opposite sides thereof. These the classemployed in electric lighting for piecesg g areinsulated from oneanotherand changing the connections of a lamp-circuit have convex faces adaptedto press against the from one dynamo to another. pairs of springs,respectively. The handle g I5 My invention relates especially to theciris adapted to be moved between the stops We cuit-changing device,which consists of two or to rest midway between said stops, as shownpairs of springs, the pairs being mounted on in Fig. l. The switch-box,as shown in Fig. 2, the opposite sides of an insulating-block and may bescrewed up against the wall in any a pivoted shifter operated by hand,whereby convenientplace. 'lhelamp-circuit connected 20 either pair maybe separated from the lampwithbinding-posts a Z) may be connected with Vcircuit terminals, respectively, and connected either one of thedynamo-machines, as may be together through the shifter, while the otherdesired. Thus, as shown in Fig. 6, the handle pair close upon saidterminals, respectively. 9 being thrown to the left the springs c (1'Thus the lamp-circuit is disconnected from are closed upon lugs a b,respectively, said 25 the dynamo of one pair of springs and conlugsbeing connected, respectively, with the nected with the dynamo of theother pair of binding-posts a and b, as shown. In this posprings, whilethe circuit of the dynamo thus sition of the handle the springs c f arecondisconnected is maintained through the menected together through themedium of the dium of aconnecting-piece upon the shifter. metallic piece9 while at the same time they 30 My invention will be readily understoodby are lifted from lugs a Z2 which are also conreference to theaccoinpai'iying drawings, in nected with binding-posts a b,respectively. which- The plate Z, which is secured to the upper endFigure 1 is afront view of a box containing of the case and to the block71., as shown in a switch embodying my invention, the face Figs. 1 and2, serve as a support or hearing for 35 of the box and crank-handlebeing removed. the shaft of the shifter. hen the crank g Fig. 2 is aside view of the same. Fig. 3 is a is midway between the stops 1' 70, asshown in front View of the crank-hai'idle. Fig. 4. is a Figs. 1 and 4,the members of each pair of plan View of the box, showing thelamp-circuit springs will be connected together, while both terminalsand the stops for limiting the movepairs will be disconnected from theterminals 40 ment of the crank. Fig. 5 is a detached pera Z) of thelamp-circuit. Moving the handle spective view of the shifter and two ofthe to the left allows spring 0' to close on contact circuit-changingsprings. Fig. 6 is a detailed a and spring (1 to close on contact I),thus perspective View showing the manner of conlooping the dynamoconnected with bindingnect-ing the circuits with the switch and theposts a binto the circuits connected with bind- 45 operation of thecircuit-changing springs. ing-posts 0 cl, as before described. On theLike parts are indicated by similar letters other hand, moving thehandle g to the right of reference throughout the different figures.over against the stop 7o allows spring 6 to close Referringto Fig. 6, wewill considerbindingon contact a and spring f to close on contact postsa and b as connected with the different b At the same time the metallicpiece g is 50 ends of the lamp-circuit. Binding-posts c d separated fromsaid springs, and thus the lamp-circuit connected with binding-postscab; is looped-into circuit with the dynamo 'co'nnected withbinding-posts e I have described my switching device as used inconnection with arc-light circuits. It

is evident that it might be used with any other circuits to which it isadapted.

Having thus described my invention, 1 claim as new and desire to secureby Letters IO Patent ihe combination, with two pairs of springs pressinginwardly, the members of each pair being adjusted to close upondiiferent con tactpieces, respectively, of 'a-'shifter,-said shifterbeing pivotally mounted between said springs, diiterent contacti'point'saltthe "free ends of the different springs of the two pairs, the springsbeing of a tension to close thereon when unopposed by the shifter,whereby on rotating the shifter the electrical connections are trans--=ferred,'substantially as-and for the purpose :"specified.

In witness whereof I hereunto subscribe my name this 6th day ofDecember, A. D. 1888.

- ERNEST P. WARNER. Witnesses: GEORGE 1?. BARTON, CHAS; GuHAWLEY.

